This document is an excerpt from the book "Facebook For Dummies, 2nd Edition" which provides an overview of Facebook and teaches readers how to use it. The document explains what Facebook is, what you can do on the site like creating a profile, connecting with friends, sharing photos and videos. It also outlines some of Facebook's key features like News Feed, friend lists, and privacy settings. The excerpt concludes by promoting other Dummies books and resources for readers to learn more skills.